Traditional Chinese Practical False myopia corrector: Circuit Design, Parts List & Workshop Prototype Guide
In short: Traditional Chinese Practical False myopia corrector. This entry documents a circuit & prototype taken from Chinese practical-technology literature, written for small-scale makers and home producers. The text below is the full English translation of the original Chinese workshop notes, covering materials and quantities, the step-by-step sequence, and the practical cautions recorded in the source. Roughly 832 words of English technical text, translated and preserved without editing. It is intended for experimental and reference use, not for regulated or commercial certification.
pseudomyopia correctorThe circuit principle of the pseudomyopia corrector is shown in Figure 71-1. Transistors VT1 and VT2 form a self-excited multivibrator with an oscillation period of about 5 seconds. VT3 and VT4 are output tubes, driving two light-emitting diodes to emit light alternately. alt="115.jpg (39759 bytes)">Figure 71-1When in use, place two light-emitting diodes in a circular paper tube, about one foot apart. One end of the tube is blocked, and the person being corrected can look into the tube from the other end, as shown in Figure 71-2. The eyes of the person being corrected will adjust the lens regularly as the two light-emitting tubes light up alternately to achieve the purpose of correcting vision. Correction for about ten minutes a day, combined with eye exercises, will have a certain effect. …
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